Lamp-hanger.



A. J. THOMPSON.

LAMP HANGER.

APPLICATION FILED FEB- 9,1914.

1,237,41 1 Patented Aug. 21, 1917.

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A. J. THOMPSON.

LAMP HANGER.

APPLICATION FILED FEB. 9. 1914.

1,237,41 1 Patented Aug. 21, 1917' 3 SHEETSSHEET 2.

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A. J. THOMPSON.

LAMP HANGER.

APPLICATION FILED FEB. 9. 1914.

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L M H 1 M 3% 3. m 2 l 1 4/0 ALLISON J'. THOMPSON, OF CLEVELAND, OHIO.

LAMP-HANGER.

Specification of Letters Patent.

Patented Aug. 21, 1917.

Application filed February 9, 1914. Serial No. 817,418.

To all whom it may concern:

Be it known that I, ALLISON J. Trroiursou, a citizen of the United States, residing at Cleveland, in the county of Cuya-hoga and State of Ohio, have invented certain new and useful Improvements in Lamp-Hangers, of which the following is a speclfication.

This invention relates generally to hangers, and particularly to that class of such devices utilized in supporting a lamp 1n a manner such that it may be raised and lowered from the ground by a rope or other similar connection.

More specifically the invention relates to a hanger comprising a main hanger member having a centrally disposed cammlngtubular portion and laterally disposed pivoted contact blocks carrying contacts which 00- operate with contacts mounted upon a yielding support carried by a lamp hanger memher which has a suitable guide for engaging the camming member of the mam hanger member and has a suitable latching portion cooperating with a latch carried by the main hanger member whereby when the lamp hanger member is raised to a certaln degree, the latch is engaged and the lamp hanger member is supported with the contacts of the-two members in engagement.

The invention may be further briefly summarized as consisting in the construction and combination of parts hereinafter set forth in the following description, drawings and claims.

Referring to the drawings, Figure 1 1s a side elevation of the hanger showing parts in section; Fig. 2 is a vertical sectional V1Q;W looking from the side; Fig. 3 is a sectional view to one side of the center showing the contact devices; Fig. 3' is a detail view;

. Fig. 4 is a section upon the line of Fig. I 2; and Fig. 5 is a section upon the line 5--5 of Fig. 1.

In carrying out the invention any preferred form and construction of parts may be employed so long as they possess the necessary characteristics, but I have shown one arrangement in the drawings which is eifective in operation, and in such embodiment 1 represents the main hanger casing member which is fiat upon its upper surface for receiving a flange portion 2 of the sheave housing 41. This housing 4 is prov ded w th an upper flat plate portion 5 provided with an opening 6 for the entrance of the sheave and an opening 7 for securlng bolts. The

housing is preferably narrow in width to accommodate itself to the sheave and is provided with a rope opening 8 under the plate portion 5. A sheave 9 is mounted upon a rod 10 which extends out,'beyond the housing and is there provided with a suitable insulator 11 held in place by suitable nuts 12. The main casing member 1 is provided with laterally extendlng contact housing portions 13 extending Well down and forming an, extension for the main hanger member. The side Wall of the main casing portion 1 is extended down at 14 on'each side and on the inside of the main hanger casing, and between this side wall and the corresponding outer Wall of each housing portion 13 is a suitable bolt 15 receiving a contact insulator 16 shown in section in Fig. 3. These contact insulators are used for the main hanger member. They are alike in construction and are interchangeable, and each consists of a main body portion 16 having an opening therein for receiving one of. the bolts 15 and laterally extending foot portions 17 lower than the main portion, and each is provided with a vertically disposed bolt opening 18. Secured to the lower faces of each of the contact insulators is a contact, and it consists of a strip of copper or similar material bent to form a V-shaped portion at the center with laterally extending extensions 19, each of which is provided with an opening for receiving a bolt- 20 passing through one of the openings 18. A suitable nut 21 holds the contact in place. One of the bolts is longer than the other and is provided with an extra nut 22 which with the extension of the plate forms a binding post for one of the incoming leads.

It will be seen from the foregoing description that the contacts and their insulators w1ll hang in the position shown in Fig. 3 by gravity and will have slight movement about the supporting bolt 15 for a purpose to be described.

Secured to the inside of the main casing member and at the center is a tubular guide and camming member 23 having laterally extending ears 2 1 which receive bolts 25 extending up through the main casing and through the ears 2 of the sheave housing. Nuts 26 on these bolts serve to hold the parts together. The tubular guide and camming member 23 is provided with a longitudinally disposed slot 27 extending along one side,

and the lower end of this member is beveled forming a camming edge face 28 for a purpose to be described. The extreme lower outer end of the tubular member is thickened to form a projection 29 which serves as a guide as will later appear. The lamp hanger member comprises a lamp hanger guide tube 30 having an upwardly pointed portion 31 for facilitating the entry of this tube into the guide and camming member 23. This upward pointed portion 31 serves also to receive on the inside a knot formed in the raising and lowering rope 32. This guide tube 30 is provided upon one side with a lateral extension 33 adapted to slide nicely in the slot 27. This extension is beveled off at the upper outer corner, as at 34, for a purpose to be described, and is further provided with a lateral extension 35 forming a latch hook and a lower lateral extension 33 spaced therefrom to form a sto as will later appear. The upper edge of t is pro ection 33 is beveled on each side to form a wedgeshaped upper edge, as shown 1n section in Fig. 1, for facilitating the entry of this rojection into the slot 27. Extending rom and integral with the side guide and camming tube 23 is a latch support 37 which is recessed at 38 to receive a latch 39 pivoted upon a pin 40 and having a nose 41 adapted for engagement under the hook 35 when in proper position. This latch is also provided with a stop shoulder 42 and a rearwardly extending tail portion 43 adapted for engagement with the underside of the latch support to limit the downward movement of the latch.

The guide tube 30 is provided at its lower end with an enlargement 44 provided with a flange 45. This flange 45 has diametrically disposed threaded openings for receiving screws 48 passing through ears 49 extending diametrically from the boss 50 which is provided with a threaded opening 51 for receiving any suitable connection from the lamp. By having the laterally extending cars 49 secured to the flange 45- there is an opening formed on each side of the clip whereby the wires from the lamp may be extended out readily. The lower end of this guide tube is also provided with diametrically disposed guide webs 52 adapted to engage in guideways 53 formed in diametrically disposed lugs 54 extending inward from a sleeve 55. This sleeve is also provided with diametrically disposed lugs 56 at ninety degrees from the lugs 54. A spring 57 is arranged between the flange 45 and the lugs 54 and 56. The tendency of this spring is to cause the sleeve to moveupward, as is shown in Fig. 1. This sleeve is provided at its lower edge with four lamp hanger contact supporting lugs 58. These lugs extend out in pairs laterally from the sleeve and at its end each is provided with an opening 59. These pairs of lugs extend out from the sleeve so that they are under the main hanger member, as shown in Fig. 4, when the-hanger members are in engagement. Supported on each pair of lugs 58 is a lamp hanger contact block comprising a body portion 60 having a vertically disposed opening 61 therein for the reception of a bolt 62. The body portion of this lamp hanger contact block is provided with a transverse recess or groove 63 adapted to receive a lamp hanger contact 64 having upwardly extending portions 65 bent toward each other and extending outward to form an extension 66. This structure forms a V-shaped arrangement for coiiperation with the V-shaped portion of the lamp hanger contact, whereby the V-shaped portion of the main hanger contact will enter the V-shaped arrangement of the extension 66 and will rub against them and finally center nicely to form a good contact at this point. The contact 64 is held in place by the bolt 62 having a nut 67 at its lower end for holding the bolt in place and another nut 68 which with the extended shank of the bolt forms a binding post for one of the leads to the lamp. The contact block is provided with lateral extensions 69 similar to the extensions 17 of the main hanger member contact blocks and each of these extensions is provided with a vertically disposed opening 70 for receiving a bolt 71 which extends down through one of the lugs and is provided with a nut 72 for holding it in place.

In order to limit the movement of the sleeve 55 with respect to the lower end of the guiding tube 30 I provide a boss 73 extending from the side of the guide tube and provided with a stop 74 preferably in the form of a screw threaded into this lug and this stop engages one of the lugs 56 carried by the sleeve, as is shown in Fig. 4 and limits the relative movement of these parts.

In operation, assuming that the members are in engagement and that the lamp hanger member is to be lowered, the operator pulls upon the raising rope causing the elevation of the lamp hanger member until the extension 33 engages with the shoulder 42 cansing the latch to be rocked in a clockwise direction out of the path of the extension or latch hook 35. In the meantime, the spring 57 has been compressed by reason of the raising of the lamp hanger member and the stationary position of the lamp hanger contact member, so that upon the release of the rope after the latch has been rocked as described, the lamp hanger member moves down quickly and the latch hook 35 passes the end of the latch when the' raised until the beveled upper edge of the extension 33 engages the cammmg edge face '28 of the guide and camming member 23 -maln hanger contacts and the circuit is established to the lamp. vA further upward movement merely causes the contacts to bear tighter one upon the other through the spring 57 and the final movement of the' lamp hanger 'member will cause the latch hook 35 to engage above the pawl then upon release, the lamp hanger member will be supported in position.

It is quite obvious from the foregoing description that upon the camming of the lamp hanger member into the proper position for the extension 33 to enter the slot torque given to this lamp hanger member and the accompanying movement of the lamp hanger contacts will be permitted by the rocking movement of the main hanger contacts upon their pivots 15.

Having described my invention, I claim A 1. In a lamp hanger, a main hanger memher, a lam hanger member, suitable raising and lowermg mechanism between said members, suitable latching mechanism between said members, a contact carried by one of said members, a contact support carried by the other of said members and supported to have bodily movement relative thereto, and a contact carried thereby and adapted by the movement of its support on its members to adjust itself to the first mentioned contact.

2. In a lamp hanger, a main hanger member, a lamp hanger member, suitable raising and lowering mechanism between said members, suitable latching mechanism between said members, a contact device carried by the lamp hanger member and comprising an insulating block, a contact carried by said block and having a V-shaped recess, a contact device carried by the 'main hanger member and comprising an insulating block having a V-shaped contact for cooperation with the V-shaped recess in the lamp hanger contact, and pivotal means for supporting the main hanger contactblock whereby its contact will adjust itself bodily to the lamp hanger contact.

3. In a lamp hanger, a main hanger member, a lamp hanger member, raising and lowering means between said members including a single cord suspension between the two members, means for insuring the proper relative position of the two parts, latching mechanism between the two members, and contact mechanism between the two parts and comprising insulating contact blocks mounted upon radially disposed pivots with With the gui respect to the center of the hanger and car- I'iedby one member, contacts carried thereby, insulating contact blocks carried by the other of said lamp hanger members and having the same general direction of'mounting, and contacts carried by these last mentioned .blocks.

4. In a lamp hanger, a main hanger member comprising a casing having a central guide member and laterally extending contact chamber-portions, a lamp hanger member having a dguiding portion cooperating ing portions of the main hanger member, raising and lowering mechanism between the members, latching mechanism between the members and contact mechanism between the members comprising an insulating block mounted in each contact chamber of the main hanger member,'a

pivot pin for each block extending radially with respect to the center of the hanger, a contact carried by each block, insulating blocks mounted upon the lamp hanger member in the same general arrangement with respect to the insulating blocks of the main hanger member, and a contact carried by each of said lamp hanger member insulating blocks and adapted to engage the corresponding contact of the main hanger member.

5. In a lamp hanger, a main hanger member, a lamp hanger member, raising and lowering means between said members including a single cord suspension between the two members, means for insuring the proper relative position of the two hanger members, contacts carried by the lamp hanger member, and contacts carried by the main hanger member pivoted upon pivots radially gisposed with respect to the hanger meiners.

6. In a lamp hanger, a main hanger mem ber comprising a casing, a centrally disposed tubular'guide, radially disposel con tact pivots diametrically disposed with respect to said taubular guide, a lamp hanger member, a guide carried thereby cooperating with the tubular guide, means between the tubular guide and the guide of the lamp hanger member for camming the latter in proper position with respect to the main hanger member, contacts carried by the lamp hanger member, and contacts loosely mounted upon the contact pivots carried by the main hanger member and cooperating with the contacts carried by the lamp hanger member, and suitable latchingv mechanism between the members.

7. In a lamp hanger, a main hanger member, a centrally disposed tubular guide having a vertical slot in one side and an inclined end forming a centering cam edge and comprising a pivot portion or boss and a narrower latch, a pin mounted in the support and extending through the pivot portion of the latch, said pin and said latch being arranged so that the latter normally tends to fall into latching position, means for limiting the movement of the latch in both directions, a lamp hanger member, a guiding member carried thereby, a centering and latching projection adapted to pass through the slot and the guide tube and to be engaged by the. latch, means for limiting the upward movement of the lamp hanger member, a single rope suspension between said members for raising and lowering the 15 lamp hanger member, and contact between the two members.

In testimony whereof I aifix my signature in presence of two witnesses as follows.

ALLISON J. THOMPSON.

Witnesses:

G. O. FARQUHARSON, C. H. TRESOH. 

